Cooling components for cooling systems of metallurgical furnaces and method for producing the same

ABSTRACT

A cooling member in the cooling system of a metallurgical furnace comprising a metal plate with pipes for a cooling medium and with transverse ribs placed between which are refractory bricks, thermo-resistant gaskets being placed between the ribs and the bricks.

United States Patent Andoniev et al.

[54] COOLING COMPONENTS FOR COOLING SYSTEMS OF METALLURGICAL FURNACES AND METHOD FOR PRODUCING THE SAME [73] Assignee: Vsesojuzny Nauchno-Issledovatel sky i Proektny Institut po Ochistke Tekhnologicheskikli Gazov i Stochnykh Vod i Ispolzovaniju Utarichnykh Energoresursov Predprinyaty Chernoi Metallurgii, Kharkov, U.S.S.R.

221 Filed: Sept. 30, 1910 211 App]. No.: 76,703

[451 Sept. 12, 1972 [52] US. Cl ..266/32, 164/108 [51] Int. Cl. ..CZlb 7/10 [58] Field of Search ..266/32; 122/6, 498; 263/44;

[56] References Cited UNITED STATES PATENTS 2,686,666 8/1954 Tau ..266/32 2,991,061 7/ 1961 Boron ..266/32 X 3,149,615 9/1964 Forsans ..122/498 3,379,427 4/1968 Zherebin et a1. ..266/32 Primary Examiner- -Leonidas Vlachos Attorney-Holman 8: Stem 1 t ABSTRACT A cooling member in the cooling system of a metallurgical furnace comprising a metal plate with pipes for a cooling medium and with transverse ribs placed between which are refractory bricks, thermo-resistant gaskets being placed between the ribs and the bricks.

2 Claims, 2 Drawing Figures The invention relates to metallurgy and, more particularly, it relates to cooling components in cooling systems of metallurgical furnaces, preferably, blast furnaces.

Known in the art are cooling components for blast furnace shells made in the form of an iron frame with built-in tubes for passing a cooling medium, the working surface of the frame having rows of refractory bricks (see the book by N.I(. Leonidov Construction and Equipment of Blast Furnaces, published by Metallurgizdat, USSR, 1955, p.62; FIG. 26).

The process of making the known cooling components consists in that moulds containing steel tubes and refractory bricks as separate insertions are filled with molten iron. During the process of cooling the iron, significant residual stresses are created which result in formation of cracks within the frame. These cracks increasing during the operation, are one of the basic reasons of a premature failure of the cooling components.

An object of the present invention is to prolong the service life of the cooling components.

This objectis attained by providing a cooling component for cooling systems of metallurgical furnaces, preferably blast furnaces, which consists of a metal plate with built-in tubes for passing a cooling medium and has rows of refractory bricks on the side of the working surface, wherein, according to the invention, the rows of refractory bricks overlap the width of the cooling components and are isolated from the plate ribs by gaskets, preferably asbestos gaskets, to eliminate any deformation of the plate.

In order that the invention may be clearly understood, one embodiment thereof will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 shows the cooling component on the side of the working surface;

FIG. 2 is the same, a lateral view.

The cooling component consists of a metal (iron) plate I (FIGS. 1 and 2), whose working surface is laid with refractory bricks 2 in rows. The length of the brick rows is equal to the width of the cooling component. The plate is provided with built-in tubes for a cooling medium (not shown on the drawing).

The bricks 2 are isolated from the supporting ribs 3 by asbestos gaskets 4.

The gaskets are laid into a mould prior to pouring molten iron into this mould. Therefore, during the solidification of the iron plate, the gaskets receive the stresses and prevent the formation of cracks in the ribs The gaskets may be made of any suitable heat-resistant material capable of resisting deformation.

The experience has shown that the proposed cooling component has a higher service life than that of the prior art devices.

The cooling component herein described may also be used in pit furnaces, for example, cupola furnaces.

What we claim is:

l. A cooling component for cooling systems of metallurgical furnaces using a circulating coolar t consistmg, m combination: a one-piece, cast, meta plate having a back portion and a plurality of mutually parallel, horizontally, extending, vertically spaced ribs having a rectangular cross section, a plurality of refractory block elements, integrally molded in said metal plate side-by-side between said ribs and complementary to the space formed therebetween for providing a substantially planar surface for exposure to the direct heat of the interior at the furnace, the improvement comprising: thermo-resistant gaskets interposed between the adjacent surface of said blocks and said ribs and integrally molded therewith whereby the insulating gaskets substantially eliminate cooling cracks formed during shrinkage of the metal plate ribs and deter promotion of the cracks during operation of the furnace to prolong the service-life of the cooling component.

2. The process for producing a cooling component for metallurgical furnace using a circulating, coolant comprising the steps of: I

A. orienting a plurality of refractory, rectangular blocks in rows and in spaced, mutually-parallel relation;

B. lining opposite surfaces of the adjacent rows of blocks with a thermo-resistant, insulating gasket for spacing the surfaces from ribs to be subsequently poured therebetween; and

C. pouring a one-piece metal plate and forming ribs between the oriented rows of blocks with a metal plate therebehind whereby production stresses between adjacent ribs due to shrinkage and cooling are absorbed by said gaskets and formation of minute stress cracks in the ribs are substantially deterred to discourage the disintegration of the ribs during use of the furnace in which the components are installed and for attaining an extended service-life of the cooling components, and for reducing the maintenance and repair on the furnace in which the cooling system incorporating the t components are installed. 

1. A cooling component for cooling systems of metallurgical furnaces using a circulating coolant consisting, in combination: a one-piece, cast, metal plate having a back portion and a plurality of mutually parallel, horizontally, extending, vertically spaced ribs having a rectangular cross section, a plurality of refractory block elements, integrally molded in said metal plate side-by-side between said ribs and complementary to the space formed therebetween for providing a substantially planar surface for exposure to the direct heat of the interior at the furnace, the improvement comprising: thermo-resistant gaskets interposed between the adjacent surface of said blocks and said ribs and integrally molded therewith whereby the insulating gaskets substantially eliminate cooling cracks formed during shrinkage of the metal plate ribs and deter promotion of the cracks during operation of the furnace to prolong the servicelife of the cooling component.
 2. The process for producing a cooling component for metallurgical furnace using a circulating, coolant comprising the steps of: A. orienting a plurality of refractory, rectangular blocks in rows and in spaced, mutually-parallel relation; B. lining opposite surfaces of the adjacent rows of blocks with a thermo-resistant, insulating gasket for spacing the surfaces from ribs to be subsequently poured therebetween; and C. pouring a one-piece metal plate and forming ribs between the oriented rows of blocks with a metal plate therebehind whereby production stresses between adjacent ribs due to shrinkage and cooling are absorbed by said gaskets and formation of minute stress cracks in the ribs are substantially deterred to discourage the disintegration of the ribs during use of the furnace in which the components are installed and for attaining an extended service-life of the cooling components, and for reducing the maintenance and repair on the furnace in which the cooling system incorporating the components are installed. 